8.84x10^-4-
scientific notation

- aluminum and copper chloride.

- the chloride ion to separate the aluminum from the oxygen so that the aluminum can react with the copper ions (and the water molecules).

i just calculated it all out, and not including weekends, and all the different days off. as of this school year (2018-2019) students are spending 2198 hours in school this year

air

in a tire you fill a tire with air

then a couple days later you check the air pressure in the tire

hope this mark me brainliest